[vtkusers] Get contour boundary values from vtkCutter

[Billy Okal]

Hi, 

Thanks for the suggestion, I tried the method you linked and it works, but generate a lot more lines that than the generated contours, typically hundreds when I try to generate say 10 contour lines. Do you know  why? 

thanks



On Wednesday, March 6, 2013 at 3:29 AM, Bill Lorensen wrote:

> see if this helps:
> 
> http://vtk.org/Wiki/VTK/Examples/Cxx/PolyData/ExtractPolyLinesFromPolyData
> 
> 
> On Tue, Mar 5, 2013 at 11:51 AM, Billy Okal <okal.billy at gmail.com (mailto:okal.billy at gmail.com)> wrote:
> > Hi All, 
> > 
> > I am new to VTK and I am trying to get the values of a mesh at a given contour/isosurface.
> > 
> > I am getting the contours using the following
> > 
> > vtkSmartPointer<vtkCutter> cutter = vtkSmartPointer<vtkCutter>::New();
> >     cutter->SetCutFunction(plane);
> >     cutter->SetGenerateCutScalars(1);
> > #if VTK_MAJOR_VERSION <= 5
> >     cutter->SetInput(inputPolyData);
> > #else
> >     cutter->SetInputData(inputPolyData);
> > #endif
> >     cutter->GenerateValues(20, -distanceMin, distanceMax);
> >     vtkSmartPointer<vtkPolyDataMapper> cutterMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
> >     cutterMapper->SetInputConnection( cutter->GetOutputPort());
> >     cutterMapper->ScalarVisibilityOff();
> > 
> > 
> > 
> > But now I want to store the (x,y,z) positions of the mesh surface along each contour to an array of points. How can I do this? Is there any implemented utility to do this? 
> > 
> > thanks,
> > 
> > 
> > billy
> > 
> > 
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> 
> 
> -- 
> Unpaid intern in BillsBasement at noware dot com

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